MIDLINE 5.0 is insulated and waterproof with excellent grip made for all day comfort. The ankle height boot is perfect for those who do not enjoy wearing a full-length wellington but do not want to compromise on the quality. 5MM INSU-FOAM ULTRA -gives all round foot comfort and insulation.6mmNITROCELL footbed - provides a soft cushioning for an athletic shoe feel. Amillion microscopic nitrogen bubbles that insulate the wearer from cold surfaces. UNDERFOOT CHASSIS - give a sure-footed platform. HEXZORBtechnology - absorbs heel strike shock for daylong comfort. SUPERDRI lining - is hard wearing wicks moister away from the wearers foot to prevent a sweaty and uncomfortable feel. It is fungus and rot proof so will not smell like cotton-lined boots. TRAXoutsole -superior grip on a variety of surfaces the tread is designed to work with the action of the foot. COMFORT RATING - -20c to +20c. We recommend purchasing the same UK size as your regular daily footwear such as a trainer. Grubs Boots have a 15mm allowance for a wool blend / thicker sock which also means if you are a half size we recommend sizing down.